SN74LS390DR

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The SN74LS390DR, or the “dual 4-bit binary counter divider with reset”, is just one of the vast selection of logic devices available in the S, SM and CH series ranges produced by Texas Instruments (TI).

The SN74LS390DR is a device that is used in applications requiring a binary counter or frequency divider that is able to process high speed digital signals. When working with this device, many users have found it useful for frequency division, digital filtering and shaping, encoding and decoding, fast sample rate conversion and logic operations.

The device features two 4-bit binary counters with individual outputs, allowing for multiple operations with different frequency outputs, as well as allowing for quiescent operation. Both of the counters can be reset manually, allowing for maintaining logical relationships between the outputs. Furthermore, the SN74LS390DR has been designed to rescue transmitted data in industrial and telecommunications applications requiring continuous data streams, such as frequency division multiplexed systems.

The SN74LS390DR is designed to operate in a very wide range of operating conditions. It can function in an operating temperature of between -40°C to +85°C and its maximum supply voltage can vary between 4.75V and 5.25V. Furthermore, its output current is also able to vary between 16mA and 54mA. As such, it is extremely versatile, allowing users to customising to fit the requirements of their application.

The SN74LS390DR works in four distinct modes; reset, divide-by-2, divide-by-4 and divide-by-8. Each counter within the device can be used individually, enabling the operation of two independent counters. Furthermore, the device works with 30ns minimum clock pulse widths, allowing for extremely fast data transfer.

The SN74LS390DR is used for many applications due to its versatility and high-speed capabilities. It is often used for switching, communications and networking, computing and logic, medical, consumer electronics and industrial applications.

In summary, the SN74LS390DR is an extremely versatile logic device that is designed to provide a range of applications with high-speed, accurate and reliable frequency division and counting operations. It operates in a wide range of conditions, with a wide variety of supply voltage and output current ratings and is suitable for a range of applications, ranging from industrial and consumer electronics to computing and communications.

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